LOOK @ Rooftop Party

Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /var/www/freelabel.net/application/Application.php:874 Stack trace: #0 /var/www/freelabel.net/application/Application.php(874): date() #1 /var/www/freelabel.net/application/Template/Page/Event/HeroSlider.phtml(21): Application::format_date() #2 /var/www/freelabel.net/application/Block/Block_Abstract.php(46): include('...') #3 /var/www/freelabel.net/application/Application.php(271): Block\Block_Abstract->toHtml() #4 /var/www/freelabel.net/application/Template/Page/Events.phtml(26): Application::getTemplate() #5 /var/www/freelabel.net/application/Block/Block_Abstract.php(46): include('...') #6 /var/www/freelabel.net/application/Block/Page/Onecolumn.php(119): Block\Block_Abstract->toHtml() #7 /var/www/freelabel.net/application/Block/Page/Onecolumn.php(73): Block\Page\Onecolumn->_executeActions() #8 /var/www/freelabel.net/application/Template/Page/Onecolumn.phtml(95): Block\Page\Onecolumn->getHtml() #9 /var/www/freelabel.net/application/Block/Block_Abstract.php(46): include('...') #10 /var/www/freelabel.net/application/Routers/Router_Abstract.php(189): Block\Block_Abstract->toHtml() #11 /var/www/freelabel.net/application/Routers/Pages/EventsController.php(10): Routers\Router_Abstract->renderLayout() #12 /var/www/freelabel.net/application/Application.php(372): Routers\Pages\EventsController->indexAction() #13 /var/www/freelabel.net/index.php(53): Application::route() #14 {main} thrown in /var/www/freelabel.net/application/Application.php on line 874